Let me start by saying these Frienda jumbo door stoppers are a game-changer! I've used them in multiple scenarios – from keeping my apartment door open for fresh air to propping open heavy classroom doors. The 8-piece set means I've got spares everywhere now.

The size is perfect – at 2 inches tall, they actually work where smaller stoppers fail. I tested them on my thick-pile bedroom carpet and they held strong, no slipping. The TPR rubber material feels durable yet has enough grip without scratching floors.

What surprised me most was the stacking feature. My back door has nearly a 3-inch gap, and stacking two stoppers worked perfectly! They interlock securely – no wobbling. The non-slip base is effective on hardwood, though on super smooth tiles (like in my bathroom), they can slide if the door pressure is intense.

After three months of daily use, I noticed minor wear at the top edges where the door makes contact – similar to one reviewer's experience. However, functionality isn't compromised. They're significantly better than the cheap vinyl ones I used before that deformed within weeks.

The black color blends discreetly, though I kinda wish I'd gotten the bright yellow version mentioned in reviews – would be easier to spot when moving them around. These are now my go-to solution for keeping doors pet-accessible (my cat approves!), facilitating moves with furniture, or just maintaining airflow through rooms.

If you need reliable door stoppers that handle heavy doors and varied floor types, these deliver excellent value. Just don't expect miracles on ultra-smooth surfaces without occasional repositioning.